York Haven Dam

York Haven Dam is a low head, run-of-the river, dam and hydroelectric plant on the Susquehanna River, United States. The dam is south of Harrisburg, Pennsylvania, at the Conewago Falls, where the river drops 19 feet in 1/4 mile. When the dam was completed in 1904, it was the third largest in the world.

The major axis of the 5,000 foot diversion dam is north to south and connects to a 3,000 foot headrace which heads southeast. The dam and headrace are laid out along natural rock formations in the river. The south eastern end is on the "western" bank at York Haven. The north end lands at Three Mile Island. There is a smaller dam further up Three Mile Island that completes the crossing to the eastern bank of the river. The hydroelectric plant is at the south eastern end near the western bank of the river.

The hydroelectric plant generates 19-20 Megawatts of power. The plant has 13 horizontal generators that produce up to 1,000 kilowatts each. There are 7 vertical generators that generate between 1,200 and 1,600 kilowatts apiece. Four of the vertical units use Kaplan turbines. The plant uses one of the first Kaplan turbines installed in the United States, which is listed as a National Historic Mechanical Engineering Landmark.

The ownership, as of 2006-08-20, runs York Haven Power Company owned by Metropolitan Edison Company, which is an operating company of FirstEnergy Corporation. The plant's FERC license runs through August 2014.

The current ownership of the dam is Olympus Power.